My setup:
Nokia N66 with Geocache Navigator.
Twitter Account
Geocaching.com's Twitter a Field Note Feature
Feed into my Facebook-Account via the twitter-Application
My problem:
When I post a DNF with Geocache Navigator, it correctly is noted on GC.com as a DNF Fieldnote.
BUT: it is twittered as "wientanz found the geocache XYZ"
I'm sure not many people use this feature, but it has merits. When it works correctly.